The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
Read moreTextbook Solutions for Elementary Linear Algebra
Chapter 3 Problem 3.215
Question
Using Cramers Rule In Exercises 1730, use CramersRule to solve (if possible) the system of linear equations.
Solution
The first step in solving 3 problem number 17 trying to solve the problem we have to refer to the textbook question: Using Cramers Rule In Exercises 1730, use CramersRule to solve (if possible) the system of linear equations.
From the textbook chapter Determinants you will find a few key concepts needed to solve this.
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Title
Elementary Linear Algebra 7
Author
Ron Larson
ISBN
9781133110873
Using Cramers Rule In Exercises 1730, use CramersRule to
Chapter 3 textbook questions
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Chapter 3: Problem 3 Elementary Linear Algebra 7
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 112, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Minors and Cofactors of a Matrix In Exercises 1316, find all (a) minors and (b) cofactors of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Minors and Cofactors of a Matrix In Exercises 1316, find all (a) minors and (b) cofactors of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Minors and Cofactors of a Matrix In Exercises 1316, find all (a) minors and (b) cofactors of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Minors and Cofactors of a Matrix In Exercises 1316, find all (a) minors and (b) cofactors of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Find the determinant of the matrix in Exercise 15 using the method of expansion by cofactors. Use (a) the second row and (b) the second column.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Find the determinant of the matrix in Exercise 16 using the method of expansion by cofactors. Use (a) the third row and (b) the first column.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 1932, use expansion by cofactors to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 33 and 34, use the method demonstrated in Example 5 to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 33 and 34, use the method demonstrated in Example 5 to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 3538, use a software program or a graphing utility with matrix capabilities to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 3538, use a software program or a graphing utility with matrix capabilities to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 3538, use a software program or a graphing utility with matrix capabilities to find the determinant of the matrix.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 3538, use a software program or a graphing utility with matrix capabilities to find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of a Triangular Matrix In Exercises 3942, find the determinant of the triangular matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of a Triangular Matrix In Exercises 3942, find the determinant of the triangular matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of a Triangular Matrix In Exercises 3942, find the determinant of the triangular matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of a Triangular Matrix In Exercises 3942, find the determinant of the triangular matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
True or False? In Exercises 43 and 44, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text. (a) The determinant of a 2 x 2 matrix is a21a12 a11a22. (b) The determinant of a matrix of order 1 is the entry of the matrix. (c) The -cofactor of a square matrix is the matrix defined by deleting the th row and th column of A
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Chapter 3: Problem 3 Elementary Linear Algebra 7
True or False? In Exercises 43 and 44, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text.(a) To find the determinant of a triangular matrix, add the entries on the main diagonal. (b) To find the determinant of a matrix, expand by cofactors in any row or column. (c) When expanding by cofactors, you need not evaluate the cofactors of zero entries.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 4952, find the values of for which the determinant is zero.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 4952, find the values of for which the determinant is zero.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 4952, find the values of for which the determinant is zero.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 4952, find the values of for which the determinant is zero.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Entries Involving Expressions In Exercises 5358, evaluate the determinant, in which the entries are functions. Determinants of this type occur when changes of variables are made in calculus.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Entries Involving Expressions In Exercises 5358, evaluate the determinant, in which the entries are functions. Determinants of this type occur when changes of variables are made in calculus.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Entries Involving Expressions In Exercises 5358, evaluate the determinant, in which the entries are functions. Determinants of this type occur when changes of variables are made in calculus.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Entries Involving Expressions In Exercises 5358, evaluate the determinant, in which the entries are functions. Determinants of this type occur when changes of variables are made in calculus.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Entries Involving Expressions In Exercises 5358, evaluate the determinant, in which the entries are functions. Determinants of this type occur when changes of variables are made in calculus.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Entries Involving Expressions In Exercises 5358, evaluate the determinant, in which the entries are functions. Determinants of this type occur when changes of variables are made in calculus.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The determinant of a matrix involves two products. The determinant of a matrix involves six triple products. Show that the determinant of a matrix involves 24 quadruple products.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Show that the system of linear equations has a unique solution if and only if the determinant of the coefficient matrix is nonzero.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verifying an Equation In Exercises 6166, evaluate the determinants to verify the equation.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verifying an Equation In Exercises 6166, evaluate the determinants to verify the equation.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verifying an Equation In Exercises 6166, evaluate the determinants to verify the equation.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verifying an Equation In Exercises 6166, evaluate the determinants to verify the equation.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verifying an Equation In Exercises 6166, evaluate the determinants to verify the equation.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verifying an Equation In Exercises 6166, evaluate the determinants to verify the equation.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
You are given the equation (a) Verify the equation. (b) Use the equation as a model to find a determinant that is equal to 69. Show that the system of linear equations has the solution and when a11a22 a21a12 0. x2 b2a11 b1a21 a11a22 a21a12 x1 b1a22 b2a12 a11a22 a21a12 a21x1 a22x2 b2 a11x1 a12x2 b1 ax3 bx2 cx d.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
If is an matrix, explain how to find the following. (a) The minor of the entry (b) The cofactor of the entry (c) The determinant of A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Show that the system of linear equations has the solution and when a11a22 a21a12 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Let be a skew-symmetric matrix of odd order. Use the result of Exercise 69 to prove that A 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Orthogonal Matrices In Exercises 7176, determine whether the matrix is orthogonal. An invertible square matrix is orthogonal when A1 AT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Orthogonal Matrices In Exercises 7176, determine whether the matrix is orthogonal. An invertible square matrix is orthogonal when A1 AT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Orthogonal Matrices In Exercises 7176, determine whether the matrix is orthogonal. An invertible square matrix is orthogonal when A1 AT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Orthogonal Matrices In Exercises 7176, determine whether the matrix is orthogonal. An invertible square matrix is orthogonal when A1 AT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Orthogonal Matrices In Exercises 7176, determine whether the matrix is orthogonal. An invertible square matrix is orthogonal when A1 AT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Orthogonal Matrices In Exercises 7176, determine whether the matrix is orthogonal. An invertible square matrix is orthogonal when A1 AT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Prove that if is an orthogonal matrix, then Orthogonal Matrices
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 78 and 79, use a graphing utility with matrix capabilities to determine whether is orthogonal. To test for orthogonality, find (a) (b) and (c) and verify that and A 1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 78 and 79, use a graphing utility with matrix capabilities to determine whether is orthogonal. To test for orthogonality, find (a) (b) and (c) and verify that and A 1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof If is an idempotent matrix then prove that the determinant of is either 0 or 1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Let be an singular matrix. Prove that for any n n matrix B, the matrix SB is also singular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 120, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2124, use either elementary row or column operations, or cofactor expansion, to find the determinant by hand. Then use a software program or a graphing utility to verify your answer.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2124, use either elementary row or column operations, or cofactor expansion, to find the determinant by hand. Then use a software program or a graphing utility to verify your answer.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2124, use either elementary row or column operations, or cofactor expansion, to find the determinant by hand. Then use a software program or a graphing utility to verify your answer.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2124, use either elementary row or column operations, or cofactor expansion, to find the determinant by hand. Then use a software program or a graphing utility to verify your answer.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
Read more -
Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding a Determinant In Exercises 2536, use elementary row or column operations to find the determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
True or False? In Exercises 37 and 38, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text. (a) Interchanging two rows of a given matrix changes the sign of its determinant. (b) Multiplying a column of a matrix by a nonzero constant results in the determinant being multiplied by the same nonzero constant. (c) If two rows of a square matrix are equal, then its determinant is 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
True or False? In Exercises 37 and 38, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text. (a) Adding a multiple of one column of a matrix to another column changes only the sign of the determinant. (b) Two matrices are column-equivalent when one matrix can be obtained by performing elementary column operations on the other. (c) If one row of a square matrix is a multiple of another row, then the determinant is 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of an Elementary Matrix In Exercises 3942, find the determinant of the elementary matrix. (Assume k 0.)
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of an Elementary Matrix In Exercises 3942, find the determinant of the elementary matrix. (Assume k 0.)
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of an Elementary Matrix In Exercises 3942, find the determinant of the elementary matrix. (Assume k 0.)
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Determinant of an Elementary Matrix In Exercises 3942, find the determinant of the elementary matrix. (Assume k 0.)
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Evaluate each determinant when a 1, b = 4, and c = 3.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Guided Proof Prove Property 2 of Theorem 3.3: If is obtained from by adding a multiple of a row of to another row of then Getting Started: To prove that the determinant of is equal to the determinant of you need to show that their respective cofactor expansions are equal. (i) Begin by letting be the matrix obtained by adding times the th row of to the th row of (ii) Find the determinant of by expanding in this th row. (iii) Distribute and then group the terms containing a coefficient of and those not containing a coefficient of (iv) Show that the sum of the terms not containing a coefficient of is the determinant of and the sum of the terms containing a coefficient of is equal to 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Guided Proof Prove Property 3 of Theorem 3.3: If is obtained from by multiplying a row of by a nonzero constant then Getting Started: To prove that the determinant of is equal to times the determinant of you need to show that the determinant of is equal to times the cofactor expansion of the determinant of (i) Begin by letting be the matrix obtained by multiplying times the th row of (ii) Find the determinant of by expanding in this th row. (iii) Factor out the common factor (iv) Show that the result is c times the determinant of A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 16, find (a) |A|, (b) |B|, (c) AB, and |AB|. Then veriy that |A||B| = |AB|
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 16, find (a) |A|, (b) |B|, (c) AB, and |AB|. Then veriy that |A||B| = |AB|
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 16, find (a) |A|, (b) |B|, (c) AB, and |AB|. Then veriy that |A||B| = |AB|
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 16, find (a) |A|, (b) |B|, (c) AB, and |AB|. Then veriy that |A||B| = |AB|
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 16, find (a) |A|, (b) |B|, (c) AB, and |AB|. Then veriy that |A||B| = |AB|
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 16, find (a) |A|, (b) |B|, (c) AB, and |AB|. Then veriy that |A||B| = |AB|
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1316, find (a) |A|, (b) |B|, and (c) |A+B|. Then verify that |A| + |B| = |A+B|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1316, find (a) |A|, (b) |B|, and (c) |A+B|. Then verify that |A| + |B| = |A+B|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Scalar Multiple of a Matrix In Exercises 712, use the fact that cA c nAto evaluate the determinant of the n n matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Classifying Matrices as Singular or Nonsingular In Exercises 1724, use a determinant to decide whether the matrix is singular or nonsingular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2530, find A1. Begin by finding A1,and then evaluate its determinant. Verify your result by finding and then applying the formula fromTheorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2530, find A1. Begin by finding A1,and then evaluate its determinant. Verify your result by finding and then applying the formula fromTheorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2530, find A1. Begin by finding A1,and then evaluate its determinant. Verify your result by finding and then applying the formula fromTheorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2530, find A1. Begin by finding A1,and then evaluate its determinant. Verify your result by finding and then applying the formula fromTheorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2530, find A1. Begin by finding A1,and then evaluate its determinant. Verify your result by finding and then applying the formula fromTheorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2530, find A1. Begin by finding A1,and then evaluate its determinant. Verify your result by finding and then applying the formula fromTheorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3136, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3136, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3136, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3136, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3136, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3136, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 3744, find (a) |AT|, (b) |A2|, (c) |AAT|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 4550, use a software program or a graphing utility with matrix capabilities to find (a) |A|, (b) |AT|, (c) |A2|, (d) |2A|, and (e) |A-1|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let A and B be square matrices of order 4 such that |A| = -5 and |B| =3. Find (a) |A2|, (b) |B2|, (c) |A3|, and (d) |B4|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let and be square matrices of order 3 such that A 4 and B 5.(a) Find AB. (b) Find 2A. (c) Are A and B singular or nonsingular? Explain. (d) If A and B are nonsingular, find A1 and B1. (e) Find ABT.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 5356, find the value(s) of k such that A is singular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 5356, find the value(s) of k such that A is singular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 5356, find the value(s) of k such that A is singular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 5356, find the value(s) of k such that A is singular.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Let A and B nxn matrices such that AB=I. Prove |A| = ) |B| = 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Let A and B nxn matrices such that AB is singular. Prove that |A| =0 and |B| = 0.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let be an n x n matrix in which the entries of each row add up to zero. Find |A|.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Illustrate the result of Exercise 61 with the matrix
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Guided Proof Prove that the determinant of an invertible matrix is equal to 1 when all of the entries of and are integers. Getting Started: Denote as and as Note that and are real numbers. To prove that is equal to you must show that both and are integers such that their product is equal to 1. (i) Use the property for the determinant of a matrix product to show that (ii) Use the definition of a determinant and the fact that the entries of and are integers to show that both and are integers. (iii) Conclude that must be either 1 or because these are the only integer solutions to the equation xy 1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Guided Proof Prove Theorem 3.9: If is a square matrix, then det Getting Started: To prove that the determinants of and are equal, you need to show that their cofactor expansions are equal. Because the cofactors are determinants of smaller matrices, you need to use mathematical induction. (i) Initial step for induction: If is of order 1, then so (ii) Assume the inductive hypothesis holds for all matrices of order Let be a square matrix of order Write an expression for the determinant of by expanding in the first row. (iii) Write an expression for the determinant of by expanding in the first column. (iv) Compare the expansions in (ii) and (iii). The entries of the first row of are the same as the entries of the first column of Compare cofactors (these are the determinants of smaller matrices that are transposes of one another) and use the inductive hypothesis to conclude that they are equal as well.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
True or False? In Exercises 65 and 66, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows that the statement is not true in all cases or cite an appropriate statement from the text. 65. (a) If is an matrix and is a nonzero scalar, then the determinant of the matrix is given by nc A.(b) If is an invertible matrix, then the determinant of is equal to the reciprocal of the determinant of A. c) If is an invertible matrix, then has a unique solution for every b.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
(a) In general, the determinant of the sum of two matrices equals the sum of the determinants of the matrices. (b) If and are square matrices of order and then (c) If the determinant of an matrix is nonzero, then has only the trivial solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Writing Let and be matrices, where is invertible. Does Illustrate your conclusion with appropriate examples. What can you say about the two determinants P1AP A?
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Writing Let be an nonzero matrix satisfying Explain why must be singular. What properties of determinants are you using in your argument?
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof A square matrix is called skew-symmetric when Prove that if is an skew-symmetric matrix, then A 1nA.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint and Inverse of a Matrix In Exercises 1 8, find the adjoint of the matrix Then use the adjoint to find the inverse of (if possible).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Prove that if an matrix is not invertible, then is the zero matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 11 and 12, prove the formula for a nonsingular matrix A Assume n 2.adjA An1
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 11 and 12, prove the formula for a nonsingular matrix A Assume n 2. adjadjA An2A
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Illustrate the formula in Exercise 11 using the matrix
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Illustrate the formula in Exercise 12 using the matrix
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Prove that if is an invertible matrix, then adjA1 adjA1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Illustrate the formula in Exercise 15 using the matrix
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 1730, use Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 3134, use a software program or a graphing utility with matrix capabilities and Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 3134, use a software program or a graphing utility with matrix capabilities and Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 3134, use a software program or a graphing utility with matrix capabilities and Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 3134, use a software program or a graphing utility with matrix capabilities and Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Use Cramers Rule to solve the system of linear equations for and For what value(s) of k will the system be inconsistent?
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Verify the following system of linear equations in and for the triangle shown in the figure. Then use Cramers Rule to solve for and use the result to verify the Law of Cosines, c2 a2 b2 2ab cos C.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Area of a Triangle In Exercises 3740, find the area of the triangle with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Area of a Triangle In Exercises 3740, find the area of the triangle with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Area of a Triangle In Exercises 3740, find the area of the triangle with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Area of a Triangle In Exercises 3740, find the area of the triangle with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Collinear Points In Exercises 4144, determine whether the points are collinear.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Collinear Points In Exercises 4144, determine whether the points are collinear.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Collinear Points In Exercises 4144, determine whether the points are collinear.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Collinear Points In Exercises 4144, determine whether the points are collinear.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Line In Exercises 4548, find an equation of the line passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Line In Exercises 4548, find an equation of the line passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Line In Exercises 4548, find an equation of the line passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Line In Exercises 4548, find an equation of the line passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Volume of a Tetrahedron In Exercises 4952, find the volume of the tetrahedron with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Volume of a Tetrahedron In Exercises 4952, find the volume of the tetrahedron with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Volume of a Tetrahedron In Exercises 4952, find the volume of the tetrahedron with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Volume of a Tetrahedron In Exercises 4952, find the volume of the tetrahedron with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Coplanar Points In Exercises 5356, determine whether the points are coplanar.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Coplanar Points In Exercises 5356, determine whether the points are coplanar.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Coplanar Points In Exercises 5356, determine whether the points are coplanar.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Testing for Coplanar Points In Exercises 5356, determine whether the points are coplanar.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Plane In Exercises 5760, find an equation of the plane passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Plane In Exercises 5760, find an equation of the plane passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Plane In Exercises 5760, find an equation of the plane passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Plane In Exercises 5760, find an equation of the plane passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 61 and 62, determine whether Cramers Rule is used correctly to solve for the variable. If not, identify the mistake.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 61 and 62, determine whether Cramers Rule is used correctly to solve for the variable. If not, identify the mistake.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Textbook Publishing The table shows the estimated revenues (in millions of dollars) of textbook publishers in the United States from 2007 through 2009. (Source: U.S. Census Bureau)(a) Create a system of linear equations for the data to fit the curve where corresponds to 2007, and is the revenue. (b) Use Cramers Rule to solve the system. (c) Use a graphing utility to plot the data and graph the polynomial function in the same viewing window. (d) Briefly describe how well the polynomial function fits the data.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Consider the system of linear equations where and represent real numbers. What must be true about the lines represented by the equations when a1 a2 b1 b2
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix In Exercises 118, find the determinant of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 1922, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 1922, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 1922, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Properties of Determinants In Exercises 1922, determine which property of determinants the equation illustrates.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 23 and 24, find (a) (b) (c) and (d) Then verify that AB AB.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of a Matrix Product In Exercises 23 and 24, find (a) (b) (c) and (d) Then verify that AB AB.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 25 and 26, find (a) (b) (c) and (d) 5A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 25 and 26, find (a) (b) (c) and (d) 5A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 27 and 28, find (a) and (b) A1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding Determinants In Exercises 27 and 28, find (a) and (b) A1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2932, find Begin by finding and then evaluate its determinant. Verify your result by finding and then applying the formula from Theorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2932, find Begin by finding and then evaluate its determinant. Verify your result by finding and then applying the formula from Theorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2932, find Begin by finding and then evaluate its determinant. Verify your result by finding and then applying the formula from Theorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
The Determinant of the Inverse of a Matrix In Exercises 2932, find Begin by finding and then evaluate its determinant. Verify your result by finding and then applying the formula from Theorem 3.8, A1 1 A.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Solving a System of Linear Equations In Exercises 3336, solve the system of linear equations by each of the following methods. (a) Gaussian elimination with back-substitution (b) Gauss-Jordan elimination (c) Cramers Rule
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Solving a System of Linear Equations In Exercises 3336, solve the system of linear equations by each of the following methods. (a) Gaussian elimination with back-substitution (b) Gauss-Jordan elimination (c) Cramers Rule
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Solving a System of Linear Equations In Exercises 3336, solve the system of linear equations by each of the following methods. (a) Gaussian elimination with back-substitution (b) Gauss-Jordan elimination (c) Cramers Rule
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Solving a System of Linear Equations In Exercises 3336, solve the system of linear equations by each of the following methods. (a) Gaussian elimination with back-substitution (b) Gauss-Jordan elimination (c) Cramers Rule
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3742, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3742, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3742, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3742, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3742, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 3742, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let and be square matrices of order 4 such that A 4 and B 2. Find (a) (b) B2, 2A, (d) and (e) B1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let and be square matrices of order 3 such that A2 and B 5. Find (a) (b) B4, 2A, (d) ABT, B1.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Illustrate the property in Exercise 45 with the following
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Calculus In Exercises 4952, find the Jacobians of the functions. If and are continuous functions of and with continuous first partial derivatives, then the Jacobians and are defined as
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Calculus In Exercises 4952, find the Jacobians of the functions. If and are continuous functions of and with continuous first partial derivatives, then the Jacobians and are defined as
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Calculus In Exercises 4952, find the Jacobians of the functions. If and are continuous functions of and with continuous first partial derivatives, then the Jacobians and are defined as
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Calculus In Exercises 4952, find the Jacobians of the functions. If and are continuous functions of and with continuous first partial derivatives, then the Jacobians and are defined as
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Writing Compare the various methods for calculating the determinant of a matrix. Which method requires the least amount of computation? Which method do you prefer when the matrix has very few zeros?
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Writing A computer operator charges $0.001 (one tenth of a cent) for each addition and subtraction, and $0.003 for each multiplication and division. Use the table on page 116 to compare and contrast the costs of calculating the determinant of a matrix by cofactor expansion and then by row reduction. Which method would you prefer to use for calculating determinants?
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Writing Solve the equation for if possible. Explain your result.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Proof Prove that if and and are of the same size, then there exists a matrix such that C 1 and A CB.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint of a Matrix In Exercises 57 and 58, find the adjoint of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Adjoint of a Matrix In Exercises 57 and 58, find the adjoint of the matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 5962, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution. If it does, use Cramers Rule to find the solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 5962, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution. If it does, use Cramers Rule to find the solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 5962, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution. If it does, use Cramers Rule to find the solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
System of Linear Equations In Exercises 5962, use the determinant of the coefficient matrix to determine whether the system of linear equations has a unique solution. If it does, use Cramers Rule to find the solution.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 63 and 64, use a software program or a graphing utility with matrix capabilities and Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule In Exercises 63 and 64, use a software program or a graphing utility with matrix capabilities and Cramers Rule to solve (if possible) the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Area of a Triangle In Exercises 65 and 66, use a determinant to find the area of the triangle with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding the Area of a Triangle In Exercises 65 and 66, use a determinant to find the area of the triangle with the given vertices.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Line In Exercises 67 and 68, use a determinant to find an equation of the line passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Line In Exercises 67 and 68, use a determinant to find an equation of the line passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Plane In Exercises 69 and 70, use a determinant to find an equation of the plane passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Finding an Equation of a Plane In Exercises 69 and 70, use a determinant to find an equation of the plane passing through the given points.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Using Cramers Rule Determine whether Cramers Rule is used correctly to solve for the variable. If not, identify the mistake.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Health Care Expenditures The table shows annual personal health care expenditures (in billions of dollars) in the United States from 2007 through 2009. (Source: Bureau of Economic Analysis) (a) Create a system of linear equations for the data to fit the curve where corresponds to 2007, and is the amount of the expenditure. (b) Use Cramers Rule to solve the system. (c) Use a graphing utility to plot the data and graph the polynomial function in the same viewing window. (d) Briefly describe how well the polynomial function fits the data.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
True or False? In Exercises 7376, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text. 73. (a) The cofactor of a given matrix is always a positive number. (b) If a square matrix is obtained from by interchanging two rows, then (c) If one column of a square matrix is a multiple of another column, then the determinant is 0. (d) If is a square matrix of order then detAdetAT .
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Chapter 3: Problem 3 Elementary Linear Algebra 7
(a) If and are square matrices of order such that then both and are nonsingular. (b) If is a matrix with then (c) If and are square matrices of order then detAB detA detB.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
(a) In Cramers Rule, the value of is the quotient of two determinants, where the numerator is the determinant of the coefficient matrix. (b) Three points and are collinear when the determinant of the matrix that has the coordinates as entries in the first two columns and 1s as entries in the third column is nonzero.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
(a) If is a square matrix, then the matrix of cofactors of is called the adjoint of (b) In Cramers Rule, the denominator is the determinant of the matrix formed by replacing the column corresponding to the variable being solved for with the column representing the constants.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1 and 2, determine whether the equation is linear in the variables x and y
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1 and 2, determine whether the equation is linear in the variables x and y
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 3 and 4, use Gaussian elimination to solve the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 3 and 4, use Gaussian elimination to solve the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Use a software program or a graphing utility to solve the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Find the solution set of the system of linear equations represented by the augmented matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Solve the homogeneous linear system corresponding to the coefficient matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Determine the value(s) of such that the system is consistent.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Solve for and in the matrix equation given
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Find for the matrix Show that this product is symmetric.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1114, find the inverse of the matrix (if it exists).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1114, find the inverse of the matrix (if it exists).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1114, find the inverse of the matrix (if it exists).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 1114, find the inverse of the matrix (if it exists).
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 15 and 16, use an inverse matrix to solve the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
In Exercises 15 and 16, use an inverse matrix to solve the system of linear equations.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Find a sequence of elementary matrices whose product is the following nonsingular matrix.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Find (a) (b) (c) and (d) Then verify that AB AB.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
If and is of order 4, then find each determinant.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let and be the following column matrices.Find constants and such thatax1 bx2 cxa, b, c 3 b.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Use a system of linear equations to find the parabola that passes through the points 1, 2, 0, 1, 2, 6.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Use a determinant to find an equation of the line passing through the points and 5, 2.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Use a determinant to find the area of the triangle with vertices 3, 1, 7, 1, and 7, 9.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Determine the currents I1 ,I2 and I3 for the electrical network shown in the figure at the left.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
A manufacturer produces three different models of a product and ships them to two warehouses. In the matrix represents the number of units of model that the manufacturer ships to warehouse The matrix represents the prices of the three models in dollars per unit. Find the product and state what each entry of the matrix represents.
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Chapter 3: Problem 3 Elementary Linear Algebra 7
Let and be three nonzero matrices such that Does it follow that A B? Prove your answer
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